CodinGame_2023_08_22__18_31_00__amount.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>

int main()
{
    float money_now;
    scanf("%f", &money_now);
    float annual_rate_of_return;
    scanf("%f", &annual_rate_of_return);
    float annual_genie_money;
    scanf("%f", &annual_genie_money);
    int your_age;
    scanf("%d", &your_age);

    float target_balance = 1000000.0;
    float current_balance = money_now;
    int age = your_age;
    while (current_balance < target_balance) {
        current_balance += annual_genie_money;
        current_balance *= (1 + annual_rate_of_return / 100);
        age++;
    }
    printf("%d\n", age);

    return 0;
}